Circulating system.



N. M. LA FORTE.

CIRCULATING SYSTEM.

APPLICATION FILED 0209,1914.

Patented May 11, 1915 7% & g timemor NORBERT M. LA FORTE, or BALTIMORE, MARYLAND.

CIRCULATING SYSTEM.

. To all iii/m it may con cern Be it known that I. Nonnunr M. L.\ Pou'iu, a citizen of the l nited States of .\meric"a, residing in the city of lmltimore, Stateof 5 Maryland, have invented certain new and useful Improvements in Circulating Hystoms, of which the following, is a speciiica eombustion engines, cooled by means, of

'-'water which .passes through a cylinder jacket and then through .a radiator 1n the front ofthe machine. In a great many ot these cars, dependence is'had for cireulatimr. on the so-called thermo-siphon or gravity systenrlmt in a multitude of cases. this is 9 found insul'licient and the purchasers of cars so equipjwd often find it neeessaryto provide a circulating pump. This is placed at v some convenient point in the radiator con- 'ncctions and usually: driven by a belt or chain from the fan shaft or other moving art. onstructed and sold. with the idea that they shal'l be installed by the owner or chauffeur of the car to be equipped. Thedevice herein described" is convenient, simple and inexpensiveand adapted-to be sold to'the same class of trade. 'To apply it, it is only necessary to remove one of the connections from the circulatingsystem and replace it Twith a corresponding length of pipe furnished with the applicants pump, at the same time boring a small hole in' the exhaust manifold in which a plug carrying a small pipe coupler is inserted. With these two 'op'erations, the installation of the applicants device is complete. In one Wellknown type of car using the thermo-siphon system of circulation, two hose couplings and an intermediate radiator pipein the connections offer a convenient opportunity forthe installation of this pump. It is only necessary to loosen the hose couplings,

remove the pipe and insert applicants pump Specification of Letters Patent.

A- greatmany oiv these pumps are.

. the heating effect.

Patented May 11, 1915.

Application filed December 9, 1914. Serial No. 876.184.

in place of it, tighten the hose couplings again, and then make the exhaust connection.

Broadly stated, the invention relates to the. use of a gas nozzle in the radiator connection proper, the nozzle being turned in the direction of circulation and fed by the exhaust. In its preferred form the cooling water circulating pump which is the subject of this invention. consists of a length of pipe to be substituted for a part of the radiator connection, the pipe having a reduced. portion or nozzle corresponding to the nozzle of an injector, a gas nozzle or outlet in the water nozzle and suitable connections from he gas nozzle tothe exhaust manifold both nozzles being turned in the same direction, preferably that of the flow of the cooling water under normal conditions.v

As has been stated, the use of a mechanical pump installed at almost any cOnVenient point in the system and connected in various ways to the moving parts of the en- ,gine is well known, some of the advantages of the applicants device being its simplicity, eheapness and convenience of installation and greater length of life, as compared to these various mechanical pumps. It is also important to note that with this system,ithe circulating and hence the cooling effect is proportionate or directly related to the heating effect for themore the power required, the greater the amount of fuel burned and the greater the exhaust pressure and circulating e'tl'ect, Whereas with the mechanical pumps, the circulating and cooling effect is proportionate to the speed of the engine which in turn bears no direct relation to In. the accompanying drawing, I have? illustrated so much of the cooling Watercirculating system of an automobile to which the device of my invention has been applied as is necessary to a full and complete understanding of the invention.

Figure 1 is a side elevation of a motor, radiator'connections and circulating pump; and Fig. 2 is'a section through the pump or barrel. V l

Referring to the drawings by numerals, each of which is used to indicate the same or similar parts in the different f gures, the illustration includes an internal comhustion motor-1 having. a Water jacket 2. a radiator tions 5 from the jacket to the radiator and vice versa.

In the form in which the motor is shown, the bottom connection includes two hose couplings 6 and 7 with an intermediate pipe. In the present instance, this pipe or any suitable portion of the radiator connections is replaced by a pump member 8 including a water nozzle 9 and a gas nozzle 10, the two being preferably concentrically placed and disposed in the same direction, which is the direction of the normal circulation of the water, and the exhaust manifold is tapped at any convenient point, as that indicated by reference character 11, for the installation of the tube 12 or rather a suitable fitting 13 to which the end of the tube is attached by means of a packed joint 14 or the like. Incidentally, this fitting may include a seat for a non-return valve 15 which serves to prevent the escape of water into the exhaust manifold ,either when the engine rocks backward in starting or stopping, or when the engine is idle and the cooling water in the radiator flows backward through the gas tube 12. Also, to prevent, as far as possible, the transmission of the pulsations of the exhaust to the gas nozzle 10, which might cause hammering in the radiator, an expansion or accumulator chamber 16 is provided in the pipe 12. This should be made of a size suilicient to practically eliminate pulsation at the nozzle and may be approximately equal to the volume of the tube. As an ad ditional means for preventing flow of the cooling water to the exhaust manifold either with or without the check valve 15,1 provide an air trap at 18 by carrying the tube 12 above the level of the water in the radiator so that when the engine is idle and the exhaust pressure ceases, the water cannot back through the tube 12 to the exhaust manifold.

In the operation of the device, circulation due to the variation in density of the water corresponding to the temperature, will take place when the engine is running, the heated water passing upward from the jacket through the connection 4 to the radiator and thence passing downward as it is cooled and back through the connection 5 to the jacket to replace the water which passes into the radiator. As has been stated how ver, this method of circulation is found in ifiieient to cool the engine and to assist the gravityor thermo-siphon action, the applicant utilizes the velocity of the exhaust gases and to this end provides the coope ating water and gas nozzles just described, both being turned in the direction of circulation. While we have shown them in the lower radiator connection, they may be placed at any convenient point in the system. Both nozzles are submerged and placed directly in the radiator c zniection Without any air chamber or cushion or the like and the water nozzle may be dispensed with using merely the velocity of the gas to accelerate the circulation of the water.

When the engine starts, a small portion the contraction of nozzle 9 is to accentuate this action giving a result similar to that obtained by means of a steam injector. If desired, a plug valve 19 may be inserted in the gas pipe so that it is possible to reduce the speed of circulation in cold weather or when cooling in the radiator is excessive. The gas escapes from the radiator through the outlet provided for the escape of steam.

. The prevention of back flow has been fully explained.

I have thus described a circulating system embodying my invention in minute detail in order that its nature and operation may be fully understood. However, the specific terms herein are used in their descriptive rather than in their limiting sense and the scope of the invention is defined in the claims.

I claim 1. An automobile accessory in the form of a circulating pump consisting of a tubular member to be used as a substitute for the radiator connection which extends upward from the bottom of the radiator to the water jacket, the said tubular member having a reduced portion forming a water nozzle disposed toward the water jacket, a gas nozzle cooperating with and directed into the water nozzle, and means connecting the gas nozzle to the exhaust manifold, the water nozzle and gas nozzle having an injector action and serving to lift the water and carry it from the bottom of the radiator to the water jacket and thus accelerate the circulating action.

2. An automobile accessory consisting of a radiator connection to act as a circulating pump, the said connection having a reduced portion forming a water nozzle directed toward the water-jacket, a gas nozzle cooperating with and turned in the direction of the water nozzle, a small tube for connecting the gas nozzle to the exhaust manifold, a chamber forming part of the passage between the gas nozzle and manifold for equalizing the pressure of the exhaust gases before they reach the nozzle, and means for preventing flow of the cooling water to said gas nozzle.

3. A Water cooling system for internal combustion engines consistin of a water jacket, a radiator and connections arranged to give thermosiphonic circulation including means connecting the bottom of the radiator to the Water jacket, the said connection being in the form of a pipe to act as a cir culating pump, a gas nozzle in the pipe turned in the direction of thermosiphonic circulation, the pipe being reduced as to its internal dimension just beyond said gas nozzle, a tube for leading a portion of the exhaust gases to said nozzle, and means for preventing back-flow of water through said tube.

4. A Water cooling system for internal combustion engines consisting of a Water jacket, a radiator and connections arranged NORBEBT M. LA FORTE.

Witnesses:

J ENNIE FARsoN, EDWIN F. SAMU'ELS 

